1548 



Ridewood, W. G. 190 3. 



On the structure of the gills of the Lamellibranchia. Phil. Trans. Royal Soc. 

 London B195: 147-284. 



Listed in Brown (1950) in bibliography for Venus mercenaria with reference to 

 chapter by Pierce, abstracted elsewhere in this bibliography. - J.L.M. 



1549 



Rindge, Mila E. 1962. 



Infectious hepatitis -in Connecticut. Conn. Health Bull. 76: 125-130. 



Historical records since 1950 and available annually to 1961 inclusive show 

 that the rates/100,000 population in Conn, and in the U.S. as a whole were 

 low in 1950, relatively high in the mid-1950s, low in the late 1950s, and 

 high in 1961. No attempt was made to differentiate between infectious 

 hepatitis and the clinically similar serum hepatitis. In only one year 

 prior to 1961 was the reported incidence higher in Conn., namely 1955. 

 Trends were similar in the State as compared with the U.S., except that a 

 maximum was reached in the country as a whole in 1954 rather than 1955, and 

 the 1961 national peak was much higher than in Conn., and higher than the 

 1954 peak. Conn, has lagged one year behind the U.S. in peaks and lows, 

 which suggested that incidence in the State might be almost double the 1961 

 rate in 1962. In 1961 New Haven, Conn., with about 6% of the population of 

 the State, had 27% of all cases reported. The New Haven peak was in Feb. 

 New Haven cases differed in several respects from those in the rest of the 

 State. Fifty-six persons with hepatitis had a history of recent consumotion 

 of raw shellfish and there was epidemiological evidence that 15 had eaten raw 

 clams from a polluted area at Greenwich, Conn. In 1961 outbreaks of 

 infectious hepatitis related to consumption of raw shellfish from polluted 

 waters also were reported from other parts of the country. - J.L.M. 



1550 



Rindge, M. E., J. D. Clem, R. E. Linkner, and L. K. Sherman. 1965. 



A case study on the transmission of infectious hepatitis bv raw clams. U.S. 

 Dept. Health, Educ . Welfare, Pub. Health Serv . , Washington", D.C.,36 p. 



Could not locate. Search terminated. - J.L.M. 



1551 



Ritchie, Theodore P. 1976. 



The U.S. Clam Industry. Del. Sea Grant College Program, Coll. Mar. Stud., 

 Univ. Delaware, Newark and Lewes, DEL-SG-26-76, 119 p. 



With some minor alterations, this is essentially the same publication as "A 

 comprehensive review of the commercial clam industries in the United States", 

 published by the U.S. Dept. of Commerce, and abstracted following this. - 

 J.L.M. 



1552 



Ritchie, Theodore P. 1977. 



A comprehensive review of the commercial clam industries in the United States. 

 U.S. Dept. Commerce, NOAA, Natl. Mar. Fish. Serv. (Delaware Sea Grant 

 Program, Coll. Mar. Stud., Univ. Del., Newark and Lewes, Del., DEL-SG-26-76), 

 ix+106 p. 



Mercenaria has the most extensive distribution of commercial clam resources in 

 the U.S. and the industry associated with hard clam harvesting has the highest 

 employment and total exvessel value. Mercenaria species occur close to shore 

 and water pollution is a major problem in their continued utilization. Hard 

 clams are often consumed raw, and public health incidents threatened the 

 viability of the industry. A canning industry based on Mercenaria 

 campechiensis was established on the west coast of Fla. in 1913. Peak 



432 



